stone



(No Model.) Y 3 Sheets-Sheeh 2.

C. M. STONE.

LOCK.

No. 550,655. `Patented Deo'. 3, 1895.

(No Modell). 3 Sheets-Sheet 31. C. M. STONE. LOCK.

No. 550,655. Patented Dec. 3, 1895.

CHARLES M. STONE, OF NASHVILLE, TENNESSEE, ASSIGNOR OF ONE-THIRD TO WILLIAM RIOII, OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 550,655, dated December 3, 1895.

i Application iiled December 24,1894. Serial No. 532,832. (No model.)

To all whom t may concern.- 4

Be it known that I, CHARLES I\I.`STONE, a citizen of the United States, residingat Nashville, in the county of Davidson and State of Tennessee, have invented certain new and useful Improvements in Locks; and I do declare the following to be afull, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

4My invention relates to improvements in locks, and refers specially to an improved lock for doors, although it maybe used on drawers, desks, or any other situation where it would operate effectively.

One object of my invention is the provision of a lock which can be used as a combination, lock or as an ordinary lock and which will perform both functions in a perfect manner.

Another object is the provision of a lock which is absolutely burglar-proof and cannot possibly be opened by a person not'familiar with the combination.

Another object of my invention is the provision of a lock which will be composed of few parts, rendering the lock compact, simple, durable, and inexpensive in construction and thoroughly efficient, and practical.

The invention consists of a lock embodying novel features of construction and combination of parts, substantially as disclosed herein.

In order that the details of construction and the operation of my lock may be understood and its merits be appreciated, I have illustrated in the accompanying drawings a doorlock embodying my improvements.

Figure l represents a plan view of my lock with one side of the casing removed and the parts in the position they assume when the sliding bolt is projected out from the casing and the combination is not set. Fig. 2 represents a similar view with the parts in the position they assume when the combination has been effected and the sliding bolt is drawn into the casing by the turning of the knob. Fig. 3 represents a similar view with the parts as they appear when the lock is locked'and cannot be worked or unlocked from the outside or as a burglar-proof lock. Fig. 4 represents a similar view of my lock having the pivoted or tilting hasps, such as used upon sliding doors. Fig. 5 represents an edge view of the series of disks or tumblers detached or separated. Fig. 6 represents a similar view with the tumblers in the position they assume or are arranged when ready for operation. Fig. 7 represents a sectional view of the tumblers in operative position. Fig. 8 represents a front or face view of the dial-plate and the plate for indicating on the dial. Fig. 9 represents a detail viewv of the shank of the outer knob having the stud for rotating the plate which indicates upon the dial the combination. Fig. lO represents a plan view of the lock taken from the inner side, specially to show one of the knobs for actuating the sliding bolt.

Referring by numerals to the drawings, in which similar numerals denote corresponding parts in all the views, the numeral l designates the casing having the covering-plate 2, the knob-shank opening 3, bolt-opening 4, post or lug 5, curved bearing 6, and slots 7 and 8 in the upper portion of said casing. The casing is of iiat rectangular form used upon doors and is secured upon the door by screws passing through the lopening shown, although I may use a casing of any kind, according to the purpose for which the lock is desired. Arrangedin the top of the casing is the sliding plate 9, which is moved back and forth by means of the knobs l0 and ll, connected to the bar and having their shanks arranged in the slots 7 and 8 of the casing. This sliding plate is formed at one end with the hook 12, the purpose of which will appear, and with the abutments or lugs 13, against which bears the iiat spring 14, which itself rests upon the curved bearing 6 of the casing. From this construction it will be seen that the plate can be moved back and forth in-the casing by means of the knobs and is held always in place by means of `the fiat spring.

In the casing is arranged the sliding bolt l5, having the slot or chamber 16, guided on the post 5 of the casing and having the wings 17, provided with studs 1S. On the upper one of said studs is pivotally mounted the le- IOO ver 19, having at one end the depending lug 2O for engaging the tumblers, as will presently appear, and adjacent to said lug having the hook 2l for engaging with the hook 12 of the sliding plate for holding the lug of the lever out of engagement with the tumblers when desired. The said pivoted lever is further provided at the other end with the depending stud 22, which fits in the coiled spring 23, which exerts its tension upon the end of the lever and has its lower end bearing upon the sliding bolt. The sliding bolt is forced normally outward by means of a coiled spring 24, which fits in the chamber of the bolt and bears upon the bolt and post 5 of the casing. From this construction it will be seen that the sliding bolt is guided in the casing and when moved back and .forth carries with it the pivoted lever, and also that lthe hook on the upper side of said lever is constructed to be engaged by the hook on the sliding plate which holds the lever up and the sliding bolt in looked position, as clearly seen in Fig. 3, in which position it is absolutely impossible to open the door from the outside, thus providing a burglar-proof lock.

In the knob-shank opening of the casing fits the square shank 25, carrying at the inner end the knob 26, and at the outer end fits the shank 27 of the outer knob, (not shown,) and this shank is provided with a projection 28, adapted to engage one of a series of openings 29 in the disk 30, which iits in the dialplate 31 and is rotatable in said dial-plate, and the disk 30 has an indicator or pointer 32 for pointing 4 to the numbers 33 on the dial, after the manner of any combination-lock- To change the combination of the lock, the dial 31 is formed with curved or segmental slots 34, guided on screws 35, and this permits the shifting or moving of the dial to present a different number to the opening 29, to be moved by the projection 2S. In this manner the indicating pointer on the disk can be moved to start at different numbers and change the combination, as is evident.

On the square shank 25 within the casing is mounted the sleeve or hub 36, having formed centrally thereon the disk or tumbler 37, and on this hub are mounted and adapted to turn freely thereon the collars 38, having a step or shoulder 39, on which fit the disks or tumblers 40, and all three of said disks or tumblers are provided with a peripheral notch or kerf 41. These keri's are adapted to be brought in line by the manipulation of the outer knob, according to the combination,

vand when brought coincident or in line the hook on the inner end of the pivoted lever will be forced down into said kerfs, as shown in Fig. 2, and when this is accomplished the simple turning of the knob will withdraw the bolt and the door can be unlocked from the outside. l

The central tumbler 37, which is moved or rotated with the shank, is provided on one face with an outward-extending lug 42 and on the opposite faces with two lugs 43 and 43X, and the tumblers 40 are provided each with an inward-extending lug 44, and the lugs 42 and 43 of the central tumbler are adapted to act upon or engage the lugs 44 on the outer tumblers to bring the kerfs 4l of all the tumblers in line to permit the hook of the lever to fall therein, and then the bolt can be released by turning the knob.

In Fig. 4 I show the lock especially constructed for sliding doors, and in this instance the pivoted lever-bolt 45 is employed and the turning of the knob tilts the bolt instead of sliding it, this being the only difference.

In operating the combination I will suppose the parts are in the position shown in Fig. l and it is desired to open the lock from the outside. The stud or projection has been placed in the proper one of the openings and the pointer is at O. The knob is given two turns to the left, then to the right to 33, and then reversed to the left until the kerfs are in line and the hook on the pivote'd lever will fall into the kerfs andthe turning of the knob will move all the tumblers and release the bolt.

It will be understood that the proper manipulation of the outer knob moves the central tumbler, and the lugs thereon engage the lugs on the outer tumblers and turn them until all the kerfs are in line. The starting point can be changed by moving the plate and presenting different openings therein to the projection on the knob-shank, and this, of course, changes the combination.

To render the lock proof against burglars or from being opened from the outside, give the knob a quick turn, which will throw the lever out of contact with the kerfs, and then move the sliding plate into engagement with IOO the lever, as shown in Fig. 3, and this allows the knob to turn freely and the bolt will remain locked and access to it is impossible.

To operate the bolt by means of the sliding plate,it is simply necessary to move the plate, the parts being as shown in Fig. 3, and the lever will be shifted, as also the bolt.

I claim 1. In a lock, the combination of a casing, a bolt therein, a lever carried by the bolt, and a sliding plate for engaging and moving the lever and bolt.

2. In a lock, the combination of a casing, a bolt therein, a lever carried by said bolt, a series of tumblers adapted to be engaged by the lever and a sliding plate for operating the bolt through the medium of said lever.

3. In a lock, the combination of a casing, a bolt therein, a lever carried by the bolt, having a hook on the upper and lower side, a series of tumblers adapted to be engaged by the lower hook on the lever, and a sliding plate for engaging the hook on the upper side of said lever.

4. In a lock, the combination of a casing, a bolt therein, a lever pivoted centrally to said bolt, a series of tumblers adapted to be en- IIO plate having the openings, the shank having` the projection adapted to engage any one of the openings to operate the tumblers, all substantia-lly as described.

ln testimony whereof l afx my signature in presence of two Witnesses.

CHARLES M. STONE. Vtnesses E. MORRIS, WM. RICH. 

